Super Street Fighter II Turbo (Super Street Fighter II X in Japan) is the follow-up to Super Street Fighter II, and the final revision in the Street Fighter II series.

The game features many balance changes from Super Street Fighter II, along with the introduction of "Super Moves" (the first instance of these attacks appearing in a Street Fighter game) and the hidden boss character Akuma (Gouki in Japan).

Ultra Street Fighter II: The Final Challengers is an updated version of 1994's Super Street Fighter II Turbo. The game features two graphical styles—classic pixel art and updated high-definition art. New gameplay mechanics and modes have been introduced and tweaks have been made to the game's balance.